barault



Jan. 5,1926. 1,566,866

G. BARAULT v HEATING STOVE Filed July 25, 1924 2 shets-sheet 2 Img/(14 11111101111101111111',

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@Ba/feudi Patented Jan. 5, 1926.

PATENT oFFlcE.

GEORGES BARAULT, or BRUSSELS, BELGIUM.

` HEATING smovn.

Application led July 25, 1924. Serial No. 728,206. i

To all whom t may concern Be it known that GEoRcEs BARAULT, a citizen o'f the French Republic, residing at Brussels, Rue de Hennin 83, in the Kingdom of Belgium, has invented certain new and useful Improvements in Heating Stoves, of which the following is a specification.

My invention relates to heating stoves as used for domestic purposes, of the kind in which the draught takes place immediately above the fire-box without passing through the fuel stored in a fuel chamber arranged inthe upper part of the stove above the fire-box.

One objectof my invention is to provide new and 1mproved means to secure the complete combustion of the combustion products at their escape from the fire-box and to recover the heat resulting from the said combustion. l

A further object consists in providing means adapted to bring to the combustion products in ignition the gases and volatile matters which may be eventually distillated from the fuel contained in the fuel chamber, so as to have the benefit of the combustion of the said matters.

tothe fire-box and tothe products in combustion that a complete combustion will be obtained at the escape of the combustion v products from the {ire-box even if the combustion in the fire-box is reduced to alminif i on linaC--D in Fig. 2.

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essentially consists in special arrangements and'combinations `ofparts,` as will be here Referring to the annexed drawingsl whichL vshow as an example one embodimentofmy,A p

` 1 1 re-box 1 and at the upper partat V29 under invention Fig.` 1 is a front elevation oftheflwliole heating stove.

A-QBin'Fig. 1.` y Fig.` 3 shows ahorizontal ,sectlon Fig. 4 shows a horizontal section .onliney EfF inv ig. 2fgiving antopview ofamovablegrate., y

Fig. 5`shows a part ofl a horizontal section corresponding to Fig. thes'movable grate, beifmlgliii another.position.`

stove comprises a lire-'box .1 provided` on And a still further object consists in s'o arranging the air` inlets 1 With these objects in view invention takeni closed by. a covery 33 and rests, 1n the front 1 wings 2. y The said fire-box which is designe to contain the fuel in i ition rests upon a base 3 which is provide with a door 4 and 1n which a movable ash-pan 5 is placed. The fire-box 1 is fitted in its front face with a fixed grate 6 which is designed to retain the fuel and in frontof which a door 7 is provided thisdoor having a number of apertures which are closed by mica-plates or the like as usually. The door 7 is provided at the lower part with air inlets 9 which are controlled by a slide 10 moved by a lever 11.

Onthe fire-box 1 the upper body 12 is laced forming a fuel chamber 13 which the lower edge of the plate 17 L The wall 19- which is connected at 2O (Fig. 3) to the' lateral walls of thebody 12 is in one piece with lateral heat radiating wings 21 forming the chamber 22 of the heat recuperating device which is closed at the rear by a plate.

23 provided with external heat radiating wings 24 and with similar internal wings 25. `The plate 23 carries a iuetopening 26 whichis connected tothe usual chimney.

Inthe chamber 22 of the recuperatin `device a numberv ofl tubes 27 .are arrang the.-` said tubes being slightly inclined andv openingat the lower end of the recuperating device at,28, youtsidefthe rear part of the Y i i an aperture 30` `of the up er plate or cover 31 oft e heating stove. is aperture 30 is e preferably provided 'with a perforated metal r sheet or with wire-gauze. The upper platel 31 yis provided with a charging opening 32 face of theheating stove, on a fiangef34 of` 37,.`v (Fig. 72,),l formed by'a ythin metal sheet 1,105 the body12., `The upper plate k31 is further 'provided rwithan aperture y 35 which is suitablyprotected .by ay erforatedfmetal` sheet 36 behind `which is rp aced a light liep f whichiis freely suspended at its upper edge .y yso'as to be `a'ble to adjust itself automatica y' in a suitable owned osition according to the intensity o the raught in the upper part of the body 12.

The fire-box 1 is provided at its lower end with a fuel supporting plate 38 having an aperture 39 under which slides a closing plate 40 fitted with an operating rod 41 projecting outside the fire-box. An inclined grate 42 rests on the fuel supporting plate 38 and is provided with a number ot' fixed bars 43 between which movable bars 44 are adapted to be displaced longitudinally.

In the example of the drawing two movable bars 44 have been shown the said bars being connected by two cross-pieces 45 to one of which a rod 46 is fixed, the said rod ending in a ring 47 in which the end of a lever 48 is engaged which lever is pivotally mounted on a support 49.

The fixed bars 43 and also the movable bars 44 have a zigzag shape as shown in Fig.

- 4 in such a manner that when the movable bars are displaced by aid of lever 48 so as to be brought for instance from the position shown in Fig. 4 into the position shown in Fig. 5 the space between the fixed and the movable bars will be. modified in shape giving raise to lozenge shaped openings through which the ashes can easily pass into the ash-pan 5. When the movable bars are returned in their initial position (Fig. 4) on the contrary, the ashesof relatively great dimensions are crus'hed between the fixed and movable bars.

In the lower rear-part of the tire-box below the inclined grate 43 there is provided an aperture 50 acting as it will be explained herelnafter as a permanent air inlet.

When the heating stove is operating normally, the fuel chamber 13 is filled up with fuel whilst the fuel contained in the firebox 1 is in ignition. If the air-inlets 9 are closed by the slide 10, only a small portion of the fuel supported by the inclined grate 42 is maintained at incandescence by a constant quantity of air passing through aperture 50 and through the fuel under the suction resulting from the draught andl acting vin the space 51 at the base of the heat recuperating device. If then the inlet apertures 9 are opened gradually, the intensity of the combustion increases in the fire-box 1 in the part adjacent to the grate 6. The daught acting also in the space between the walls 19 and 14, air is also admitted through the automatic Hap 37. This current of air carries with it the gases and volatile matters which are eventually liberated in the fuel chamber 13; the mixture or the air alone as the case may be, passes' at 52 above the wall 14, descending between the walls 19 and 14 in the direction of the arrow 53 so as to reach finally the space or chamber 51 at the base of the heat recuperating device, thus bringing to this point the necessary quantity of air to secure the complete combustion of the gases and of the carbon monoxide resulting from the combustion in the tire-pot. 1 and which are carried to the igniting ten'ipcrature on account of the inclination of the grate 42 and of the permanent air inlet 50. As a result a very intensive combustion takes place at 51; the flames ascend in the heat reeuperating device 22 thus heating the walls of the said device and also the tubes 27 in which the air is caused to circulate the cold air contained in the place or room which is to be heated entering the tubes 27 at the lower end 28 and escaping at the upper end 29 into the place or room after having recovered the heat contained in chamber 22 and a part of this heat is further radiated in the room through the wings 2l and 24 of the heatI recnpcrating device.

It', on the contrary the apertures 9 are closed to moderate the working of the stove, the suction of' air resulting from the draught of the chimney causes the iiap 37 to open to a greater extent as previously in such a manner that the Said flap always secures automatically the inlet of the quantity of air which is necessary to obtain a con'ipletc combustion the said quantity of air being in fact iuvertedly proportional to the quantity of' air admitted through the controlled apertures 9. n

It, will be observed that as a result of the above described construction, the carbon monoxide and also the volatile matters escaping eventually from the charge of fuel contained in the chamber 13, together with the gases resulting from the combustion in the fire-box 1 will be burnt at the lower end 51 of the heat recuperating device, this end 51 acting as a combustion chamber vto achieve the combustion. In fact it is in this chamber that the combustion is the most intensive and it is in order to resist to the high temperature at this point that the plate 17 is made of a high refractory material. lVhen the combustion is moderated by the closure of the air inlet 9, the rear part of the fuel supported by the grate 42 is nevertheless maintained at incandescence by the permanent air inlet taking place through the aperture 50; although the quantity of air admitted through this aperture is rcduced to the minimum, the complete combustion of the gases escaping from the firebox is nevertheless secured by a greater quantity of air which is then admit-ted through the automatic flap 37, thisquantity being as already stated always invertedly proportional to the quantity of air admitted through the controlled air inlets 9.

The removing of the ashes from the firebox 1 is very easilv obtained b v the displacement as described of the movable part of the inclined grate 42 and further by the displacement Lacasse of the plate 40 closing normally the aperture 39 provided in the supporting plate' 38.

What Il claim is:

1. In a heating stove a tire-box, the said fire-box being provided with controlled airinlets and with a permanent air-inlet, a grate in the said lire-box, a fuel chamber arranged above the fire-box, means-for admitting air above the fuel chamber, a high recuperating device arrangedat the rear of the fuel chamber the said device being provided with a lao draught connection and being separated from the fuel chamber by an air passage, whereby the air admitted above the fuel chamber is conducted at the upper rear end of the fire-boi; to achievethe combustionof the gases escaping from the fire-box at the lower end of the heat recuperating device.`

2. In a 4heating stove, a fire-bor, the said fire-box being provided with controlled air inlets, a grate arranged in the said lire-box,

means for admitting permanently a reduced quantity of air below the said grate, a fuell chamber arranged above the fire-box, means for admitting air -automatically above the fuel chamber, a heat recuperating device arranged at the rear of the fuel chamber, a

' movable wall arranged in the fuel chamber at a distance from the heat recuperating device, whereby a passage is formed between the fuel chamber and the heat recu rating device to conduct the air admitted a ovethe fire-box to the upper rear-end of the firebox and to the lower end of the heat recuperating device and a combustion chamber formed at the lower end of the heat recui pei-ating device above the upper rear end of the fire-box.

3. In a 'heating stove, a fire-box, the said fire box being provided with controlled air inlets, a fuel supporting plate arranged in the said firebox, an inclined grate adjacent' tc the said supporting plate, means for admttingpermanently. a reduced quantity of air below the inclined grate, a fuel chamber arranged .above the fireox,a heat recuperating device arranged at the rear of the fuel vso chamber the said device having a wall closing -the` fuel chamber, amovable wall arranged in the fuel chamber 4at adistance from the said, wall ofthe heat recuperatingy device, whereby an air passage is formed between the fuel chamber and the heat recuperating device, a combustion .chamber formed at the upper rear-end ofthe re-box between the lower end of the heatrecuperating device and the movable plate of the fuel chamber, plate or cover closing the fuel chamber at i't-s upper end, the said plate being provided with an air inlet, and a freely ispended-lap cooperating withthe said air inlet. whereby the quantity' of air admitted above the fuel chamber under the action'of the draught is invertedly proportional to the signature.

,mally the said aperture, an inclined grate adjacent to the said supporting plate,

the said grate comprising fixed iron-bars and movable iron-bars of zig-zag shape, means for admitting permanently a reduced quan'- tity of air belowthe said inclined grate, a fuel chamber arranged above the fire-box, a refractory plate located inthe said fuel chamber at a distance from the upper part ofthe lire-box, a wall resting upon the said refractory plate whereby a descending air passage 1s,v formed in the fuel chamber,a heat recuperating device xed to the fuel. chamber, the said device being open at its lower part above the fire-box and having a wall ending above the fire-box' at a level higher than the refractory plate, whereby -a combustion chamber is -formed above the upper rear-end of the. re-box a plate or cover closin the fuel chamber at' its u per end the sai plate being provided wit an air admitted to the fire box through thel con -loo 5. In a heating stove a supporting base, a

trolled air inlets.

fire-box, the saidl fireebox being provided with controlled Aair-inlets, a fuel sup orting plate arranged in the said fire-box, t e said plate having an aperture and a movable slide closing normallyl the said aperture an inclined grate adjacent to the said supporting plate, the said grate comprising fixed iron-bars and movable iron-bars, of zig-zagshape and being located above an air inlet aperture provided in the fire-box and a body resting upon the lire-box, the said ybody comprising an upper air inlet, a descending air Passage, ating device formin a chamber havingmhgeat radiating wings an air circulating tu 6. In a heating stove, a fire-box provided with controlled air inlets anda separate permanentair inlet and a body located above in' the fire-box, the said body comprising a fuel chamber a heat recuperating device, and a descending air passage arranged between the fuel chamber andthe heat recuperating device, the. said air passage and heat recuperating device forming above the up of the fire-box a combustion c amber. for the gases escaping from the lire-box.

In testimonyI whereof I have aixed my GEORGES BARAULT.

r rear end a fuel .chamber and af heat recuperi 

